Improvement in summer cooking-furnace



I R. 0. STEVENSON.

Portable Furnace.

No. 101,676. Patented April 5, 1870."

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Letters Patent No. 101,676, dated Ajlirz'l 5, 1870.

IMPROVEMENT IN SUMMER COOKING-FURNACE.

The Schedule referred to in these Letters Patent and making part of thesame To all whom it may concern Be it known that I, RUFUs O. STEvnssox,of Baltimore, in the county of Baltinore and State of Maryland, haveinvented a new and valuable Improvement in Summer Cooking-Furnaces; andI do hereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, referencebeing had to the annexed drawing making a part of this specification,and to the letters and figures of reference marked thereon.

Figure 1 of the drawing isa representation of a vertical section of myfurnace;

Figure 2 is a view of the cover;

Figure 3 is a perspective view of the disk D and tube E; and

Figure 4 is a view of thel cylinder B, all of which are hereinatterdescribed.

My invent-ion relates to means for cooking, heating sad-irods,'and othersimilar domestic activities, and consists in the construction and novelarrangement of devices by which such domestic labor may lbe carried onin an open yard or summer kitchen without the aid of the ordinarycooking-stove, and which s aid devices may also'be made to serve asimportant appendages to a cooking-stove when desirable so to do.v

A of the drawing represents an outmwcyliluler, with openings at itsbottom, marked c, for the admission of air. i,

B represents an interior cylinder, constructed in the 'funn of aninverted frustum of a cone, and having its lower end slotted, as shown.

The top of this cylinder B has a circular Hauch, a,

by which it rests upon the top of cylinder A. This cylinder B is of lesslength than cylinder A, as the drawing represent, and at its lower endit has a lianch turned inward to form a rest and support for the disk D,next mentioned.

The disk D 'is formed in theshape of a slotted plate, of a diameteradapted to the interior of the bottom of cylinder B, upon the lowerflanch of which itl rests, and from which it is removable' at will.

E is a perforated conical tube attached 'firmly upon the disk D, asshown, and extends upward therefrom to within' three inches, moreorless, from the top of cylinder B. There is an openingr in the centerof disk D, of the size ofthe lower .end o'f this tube, and over whichopening said tube is attached.

The letter H represents my combined cover, damper, and griddle. Itconsistsin a disk that rests upon the topof cylinders A and B, as shown,and is removable therefrom. This disk is cnt out in the manner shown,forming a series of slots.

Above this disk I affix a slotted wheel with radiating arms, adapted foropening or closing the slots in the disk at will, in the manner ofregisters for heaters. This wheel marked K ou the drawing.

To operate mydevice, I arrange the several parts together in the mannershown on iig. l, and build a coal iire upon the disk D.

I can then use the cover H as a griddle for broiling, or can remove itif desirable, and place a kettle in its stead.

The tube E serves to preventthe coal from packing, while itsperforations, in conjunction with the openings c and the slots iu disk Dand cyliuderB, serve to supply the requisite air to the burning fuel.

My apparatus is also adapted for use in an ordinary cooking-stove, beingusedin a boiler-hole, or it may be used in an open tire-place, when itis desirable, to prevent heat from passing into the apartment.

`In using it in a boiler-hole, I tirstmake the fire as great asnecessary, and afterward arrange it in the boiler-hole, when the draughtof -air will pass downward and out through the stove-pipe.

The slots lin the side of the tire-pot, and the perforations c in thewall'of the central tube, are designed to permit a thorough draught toall parts ofthe coalbed, and at the saine time to prevent the walls ofthe lire-pot and central tube from being rapidly burned out.

, During the operation of kindling, the register at the top is opened,and adownward draught is at once created through thc openings abovementioned, and through the removable grateat the bottom.. After the tireis thoroughly kindled, the register may be totally or partially closed,and the heat allowed -to ascend for the purposeof cooking'. Ihe door ofthe stove should then be opened to supply air to the tire.

I cla-ini as my invention- In combination with a register-cover H, thelire-pot B, havingside slots I, and removable grate D, having centralconical tube E open at both ends, and provided with the pcrtbrations c,as specified.

In testimony that I claim the above, I have hercunto subscribed my namein the presence of two witnesses. II'FLS 0. SIEVEXSOX. \\'itncsscs:

lil. ILMAs, I). D. Kann.

